diff --git a/.github/ISSUE_TEMPLATE.md b/.github/ISSUE_TEMPLATE.md
index 9c09d86ba..d73b9ff6f 100644
--- a/.github/ISSUE_TEMPLATE.md
+++ b/.github/ISSUE_TEMPLATE.md
@@ -5,7 +5,7 @@ Please provide a brief description of the issue.
 ## Version
 
 Please provide your Lighthouse and Rust version. Are you building from
-`master`, which commit?
+`stable` or `unstable`, which commit?
 
 ## Present Behaviour
 
diff --git a/.github/workflows/test-suite.yml b/.github/workflows/test-suite.yml
index 04903d3c6..864d8c239 100644
--- a/.github/workflows/test-suite.yml
+++ b/.github/workflows/test-suite.yml
@@ -3,7 +3,7 @@ name: test-suite
 on:
   push:
     branches:
-      - master
+      - stable
       - staging
       - trying
       - 'pr/*'
diff --git a/README.md b/README.md
index 164abbb14..865b0a590 100644
--- a/README.md
+++ b/README.md
@@ -4,11 +4,11 @@ An open-source Ethereum 2.0 client, written in Rust and maintained by Sigma Prim
 
 [![Build Status]][Build Link] [![Book Status]][Book Link] [![Chat Badge]][Chat Link]
 
-[Build Status]: https://github.com/sigp/lighthouse/workflows/test-suite/badge.svg?branch=master
+[Build Status]: https://github.com/sigp/lighthouse/workflows/test-suite/badge.svg?branch=stable
 [Build Link]: https://github.com/sigp/lighthouse/actions
 [Chat Badge]: https://img.shields.io/badge/chat-discord-%237289da
 [Chat Link]: https://discord.gg/cyAszAh
-[Book Status]:https://img.shields.io/badge/user--docs-master-informational
+[Book Status]:https://img.shields.io/badge/user--docs-unstable-informational
 [Book Link]: https://lighthouse-book.sigmaprime.io
 [stable]: https://github.com/sigp/lighthouse/tree/stable
 [unstable]: https://github.com/sigp/lighthouse/tree/unstable
diff --git a/book/src/contributing.md b/book/src/contributing.md
index b9fae55a6..da18439c8 100644
--- a/book/src/contributing.md
+++ b/book/src/contributing.md
@@ -14,7 +14,7 @@ to work on.
 
 To start contributing,
 
-1. Read our [how to contribute](https://github.com/sigp/lighthouse/blob/master/CONTRIBUTING.md) document.
+1. Read our [how to contribute](https://github.com/sigp/lighthouse/blob/unstable/CONTRIBUTING.md) document.
 2. Setup a [development environment](./setup.md).
 3. Browse through the [open issues](https://github.com/sigp/lighthouse/issues)
    (tip: look for the [good first
diff --git a/book/src/intro.md b/book/src/intro.md
index c21e4b6bc..d3a95c863 100644
--- a/book/src/intro.md
+++ b/book/src/intro.md
@@ -30,7 +30,7 @@ to understand how we develop and test Lighthouse.
 ## About this Book
 
 This book is open source, contribute at
-[github.com/sigp/lighthouse/book](https://github.com/sigp/lighthouse/tree/master/book).
+[github.com/sigp/lighthouse/book](https://github.com/sigp/lighthouse/tree/unstable/book).
 
-The Lighthouse CI/CD system maintains a hosted version of the `master` branch
+The Lighthouse CI/CD system maintains a hosted version of the `unstable` branch
 at [lighthouse-book.sigmaprime.io](http://lighthouse-book.sigmaprime.io).
diff --git a/book/src/local-testnets.md b/book/src/local-testnets.md
index 45365d9ec..364475cbe 100644
--- a/book/src/local-testnets.md
+++ b/book/src/local-testnets.md
@@ -4,5 +4,5 @@ During development and testing it can be useful to start a small, local
 testnet.
 
 The
-[scripts/local_testnet/](https://github.com/sigp/lighthouse/tree/master/scripts)
+[scripts/local_testnet/](https://github.com/sigp/lighthouse/tree/unstable/scripts)
 directory contains several scripts and a README that should make this process easy.
diff --git a/book/src/mainnet-validator.md b/book/src/mainnet-validator.md
index 0443a1a25..bb9a1d218 100644
--- a/book/src/mainnet-validator.md
+++ b/book/src/mainnet-validator.md
@@ -4,7 +4,7 @@
 [lh-book]: https://lighthouse-book.sigmaprime.io/
 [testnet-validator]: ./testnet-validator.md
 [advanced-datadir]: ./advanced-datadir.md
-[license]: https://github.com/sigp/lighthouse/blob/master/LICENSE
+[license]: https://github.com/sigp/lighthouse/blob/stable/LICENSE
 [slashing]: ./slashing-protection.md
 [discord]: https://discord.gg/cyAszAh
 
diff --git a/book/src/slashing-protection.md b/book/src/slashing-protection.md
index 2b5a66b09..8763f8b10 100644
--- a/book/src/slashing-protection.md
+++ b/book/src/slashing-protection.md
@@ -177,4 +177,4 @@ out on Discord if you need help.
 The Lighthouse developers do not guarantee the perfect functioning of this software, or accept
 liability for any losses suffered. For more information see the [Lighthouse license][license].
 
-[license]: https://github.com/sigp/lighthouse/blob/master/LICENSE
+[license]: https://github.com/sigp/lighthouse/blob/stable/LICENSE